- 5/8" Tree spikes (25-40 depending on how close together you want them)
- iPhone Cover (I recommend something slightly more sturdy than a silicon skin, yet still puncturable)
- Sharp pointy object for making holes (I used a sharp, 1mm screw)
- Sharpie or pen
The cover already had the perfect grid to follow for placing the spikes, and since it was a more sturdy material, they didn't point in all crazy directions like the first one. Unlike the first one, I would definitely feel comfortable carrying this every day without fear of harming it. Love!